This was a post by the Gundr Hex bolt sizes
Date: Tue, Nov 15, 2011 - 01:22 PM ET
The hex bolt in the stock is a3/16" wrench.
The smaller wrench for the trigger housing and adjustable stocks is 3/32".
The wrench size for the forend shoe, pivot screw of the adjustable rib, and the rear trigger guard screw is 5/64"
The size for the out-of-battery screw in the trigger housing is 1/16"
The smallest wrench needed is .050". This is needed for all of the small 4-40 set screws.